Amazon's Prime member service has almost become synonymous with the company and comes with dozens of perks. I won't try to sell you a membership, but if you order from Amazon multiple times a month, a Prime membership will bring tons of value. There's certainly a reason more than 100 million people have invested in the service. You can share an Amazon Prime membership with one other adult, and kids who share the account can access perks like Amazon Prime Instant Video. Amazon Family provides a 20% discount on diapers, baby food, and household items. If you're a student, you can use an email ending in .edu to sign up for Amazon Prime Student. The service offers a six-month trial and costs $6.49 a month after that. People receiving Medicaid or EBT benefits are also eligible for a discounted Prime membership at $5.99 per month.While items on Amazon are often cheaper than what you'd find in stores, the prices can also fluctuate quite a bit over time. Price tracker sites like CamelCamelCamel.com will let you know the highest and lowest prices an item has sold for in the past. You can set a tracker to email you when an item is available for the right price. The Amazon's Choice banner will let you identify the most popular items for sale based on what you searched. In my experience, they're usually pretty good recommendations, but I suggest that you use Amazon's Choice as a baseline to compare some of the other products available. I've often found products that were cheaper than Amazon's Choice, or had much better features for a dollar or two more.Some household products will let you subscribe for scheduled deliveries at a slight discount. While I'm used to picking up things like cleaning supplies and paper towels at brick and mortar stores, I've found that grabbing them with an Amazon subscription ultimately saves me a bit of money in the long run. You can set the frequency of the delivery and even what day of the week your delivery arrives, so the process is pretty hassle-free.If you're planning a major purchase of $100 or more on Amazon, you can get an extra $10 to spend by purchasing a digital gift card first. The balance will be added directly to your Amazon account so you can use it right away. Prime members also earn an extra 2% when reloading their gift card balance, so that gives them $2 extra for buying a $100 gift card, on top of the extra $10.While its not heavily advertised, you can buy items that have been returned to Amazon at steep discounts through Amazon Warehouse. Amazon Warehouse refurbishes expensive electronics too, making it a great way to find discounted tech. Amazon Outlet is filled with overstocked items that may be a bit behind the latest trends but still work just fine. The store has thousands of discounted products from major brands.Amazon has dozens of sales happening at any given moment, and you can visit the Gold Box page to keep track of them all. You can search for items in specific categories like electronics or luggage to find what you're looking for, and see limited-time lightning deals before they start. Just remember: Even if a deal looks tempting, you should use CamelCamelCamel or another price-checker to make sure that the price won't drop any further in the future.It may not save you money, but using AmazonSmile helps contribute a bit of money towards making the world a better place. You can shop using the AmazonSmile link at no cost to yourself and Amazon will donate 0.5% of your order's value to the charity of your choice.